Calender roll



CALENDER ROLL Filed March 18, 1937 INVENTOR.

rimmzzw.

ATTORNEY.

Patented Jan. 9, 1940 UNITED. STATES PATENT OFFICE,

2,186,679 ,OALENDER. non.

- Archibald c. Lade, Easthampton, Mass 'asaignor to B. F. Perkins & .Son, Inc., Holyoke, Masa, a corporation of Massachusetts Application March 18, 1937, Serial No. 131,620

1 Claim.

This invention relates to improvements in calender rolls adapted for operating on paper, fabric, and the like.

The principal objects of the invention are di- 5 rected to the provision of a novel calender roll which is adapted for use in a calender or calender stack in co-operation with another roll or rolls which are similar or have different characteristics and between which rolls a web of paper'or fabric by not only obtaining the advantages of both a relatively hard and a relatively yieldable roll but also providing a novel surface which is capable of giving desirable characteristics to the paper or fabric on which it operates.

Various other novel features and advantages .20 of the invention will be hereinafter more fully referred to in connection with the accompanying description of the invention in its present preferred form. In the drawing:

Fig. 1 is a side elevational view of the roll em- 25 bodying the novel features of the invention;

Fig. 2 is a sectional elevational view on the line 2' 2 of Fig. 1.

Referring now to the drawing more in detail the invention will be fully described.

80 The roll of the invention has a central shaft 2 and end members 6 secured thereon in some suitable manner. Between the flanges there is a body 4 formed from sections or discs which are held in pressed-together relation by the end mem- 86 bers 6.

The end members 6 may be held or locked on the shaft 2 by. any suitable means. The degree of pressure may, of course, be varied for different purposes.

40 The discs or sections for the body are formed from fibrous material preferably from fabric, and these have openings therethrough for the shaft. To prevent the discs or sections forming the roll body from turning on the central shaft, there 45 may be keys 8 or the like receivable in splines in the discs.

The discs II) as stated and illustrated in Fig. 2 are preferably formed of some more or lessyieldable material and fabric has been found-to be 60 suitably adapted for the purpose of the invention. I

The discs adjacent their periphery have portions that are impregnated or treated with some material which in the finished roll is relatively 55 more rigid or less yieldable and resilient than inner portions of the discs. To that end some plastic such as a phenolic resin or phenolic condensation product has been found to be satisfactory.

As a good example the outer peripheral por- I tion of the discs have been treated with a substance known as Bakelite. The fabric has been treated or impregnated 'with this material and suitably cured or processed to harden the plastic.

'In this way each disc or section of the roll has a 10 relatively-hard non-yieldable peripheral portion l2 about a more yieldable body portion H which surrounds the central shaft.

The discs or sections described are arranged in stacked relation on the shaft and pressed together and confined in their pressed-together re-- lation by the members 6, whereby there is provided a roll body having a more or less rigid or "hard peripheral portion M with a'less rigid and more yieldable inner portion I2 about a rigid go shaft. The peripheral surface of the roll is worked down to the desired diameter and surface by grinding, turning, or some other suitable operation. v

The roll body formed as described thus has a relatively yieldable portion around the central shaft and a relatively hariier more rigid or less yieldable outer layer or shell. It also has a novel peripheral surface in that it is composed of flbrous material and the plastic medium whereby 0 the roll is capable of performing operations not heretofore known in the art. Y The roll of the invention may be employed in some instances adjacent a-metal roll or'it may be employed in cooperation *with a similar roll, or 5 a, laminated roll of somelother form'depending upon the use to which the roll is to be employed.

It will be observed that the surface of the roll is unique in that it is not necessarily entirely of either fibrous or plastic material; that'is, it is 40 not composed entirely of either the more rigid substance or the yieldable material, but it is a combination of those two substances. By varying the amounts of the harder plastic various results may be obtained. The surface of theroll is 5 backed up by the relatively rigid layer or shell of the roll which surrounds the less rigid central part all to the end that the roll has the characteristic of a hard roll and the resiliency and yieldability of a. relatively rigid roll. While I have described the invention in great detail and with respect to a preferred form thereof,.it is not desired to be limited thereto since many changes and modifications may be made therein without departing from the spirit and scope of the invention. What it is desired to claim and secure by Letters Patent of the United States is: a

A calender roll of the class described comprising in combination, a rigid, central shaft, disclike members disposed in adjacency on said shaft, said disc like members being formed of fibrous material and having their outer peripheral portions impregnated with hardened plastic material, and means holding said members in tightlypressed roll-forming relation on said shaft where by they present a substantially rigid and unitary peripheral portion having a. substantially hard peripheral surface and the roll has a relatively less hard and resilient area. around said rigid shaft.

ARCHIBALD C. LADE. 

